<template>
  <div class="login_container">
    <div class="login_box">
      <!--头像区-->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!--表单区-->
      <el-form :model="loginForm" :rules="loginFormRules" ref="loginFormRef" class="login_form" label-width="0px">
        <!--用户名-->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!--密码-->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" type="password" prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <!--按钮-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
  export default {
    name: "Login",
    data() {
      return {
        /*登录表单 绑定的数据对象*/
        loginForm: {
          username: 'admin',

          password: '123456'
        },
        /*表单验证规则对象*/
        loginFormRules: {
          /*验证用户名是否合法*/
          username: [
            {required: true, message: '请输入登录名称', trigger: 'blur'},
            {min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur'}
          ],
          //验证密码是否合法
          password: [
            {required: true, message: '请输入登录密码', trigger: 'blur'},
            {min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur'}
          ]
        }
      }
    },
    methods: {
      //重置表单
      resetLoginForm() {
        console.log(this.$refs)
        this.$refs.loginFormRef.resetFields()
      },
      login() {
        //登录前的表单验证
        this.$refs.loginFormRef.validate(async valid => {
          console.log(valid);
          if (!valid) return;
          const {data: res} = await this.$http.post('login', this.loginForm);
          // console.log(res);
          if (res.meta.status !== 200) return this.$message.error('登录失败')
          this.$message.success('登录成功')
          //1. 将登录成功之后的token,保存到客户端的sessionStorage中
          //1.1 项目中除了登录之外的其他API接口，必须在登录之后才能访问
          //1.2 token 只应在当前网站打开期间生效，所以讲token保存在sessionStorage中
          window.sessionStorage.setItem("token", res.data.token);
          //2.通过编程式导航跳转到后台主页，路由地址是 /home
          this.$router.push('/home')
        })
      }

    }
  }
</script>

<style scoped lang="less">
  .login_container {
    background-color: #2b3b6b;
    height: 100%;

    .login_box {
      width: 450px;
      height: 300px;
      background-color: #ffffff;
      border-radius: 3px;
      /*  居中*/
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);

      .avatar_box {
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #eee;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #ffffff;

        img {
          width: 100%;
          height: 100%;
          border-radius: 50%;
          background-color: #eee;

        }
      }

      .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
      }

      .btns {
        display: flex;
        justify-content: flex-end;
      }
    }
  }

</style>
